- Two separate CentOS VMs with the lastest Community Server (192.168.1.101) and Document Server (192.168.1.102) set up and working
- One nginx reverse proxy for public access

On LAN, the Document Server's integration into the Community Server works without a problem: Logged into the Community Server, then Settings / Document Service and after entering the internal IPs, the Document Server becomes available through Community Server and I can create and edit documents.

Now, trying to open the document editor when connecting through my public address/domain name doesn't work without modifying the settings under Document Service accordingly - this much is clear to me.

However, as I'm new to nginx as a reverse proxy, I couldn't figure out how to make the document editor available when connecting from the public IP.
I've set up SSL and can connect to both the Community Server and the Document Server individually: